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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011-2012 The Chromium OS Authors. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
// Scope (EC0)
Device (BATX)
{
Name (_HID, EISAID ("PNP0C0A"))
Name (_UID, 1)
Name (_PCL, Package () { \_SB })
Name (PBIF, Package () {
0x00000001, // Power Unit: mAh
0xFFFFFFFF, // Design Capacity
0xFFFFFFFF, // Last Full Charge Capacity
0x00000001, // Battery Technology: Rechargeable
0xFFFFFFFF, // Design Voltage
0x00000003, // Design Capacity of Warning
0xFFFFFFFF, // Design Capacity of Low
0x00000001, // Capacity Granularity 1
0x00000001, // Capacity Granularity 2
"", // Model Number
"", // Serial Number
"LION", // Battery Type
"" // OEM Information
})
Name (PBST, Package () {
0x00000000, // Battery State
0xFFFFFFFF, // Battery Present Rate
0xFFFFFFFF, // Battery Remaining Capacity
0xFFFFFFFF, // Battery Present Voltage
})
Name (BTNM, Zero) // Battery number
// Workaround for full battery status, enabled by default
Name (BFWK, One)
// Method to enable full battery workaround
Method (BFWE)
{
Store (One, BFWK)
}
// Method to disable full battery workaround
Method (BFWD)
{
Store (Zero, BFWK)
}
Method (_STA, 0, Serialized)
{
If (BOL0) {
Return (0x1F)
} Else {
Return (0x0F)
}
}
Method (_BIF, 0, Serialized)
{
// Update fields from EC
Store (BAM0, Index (PBIF, 0))
Store (BDC0, Index (PBIF, 1))
Store (BFC0, Index (PBIF, 2))
Store (BDV0, Index (PBIF, 4))
Divide(BFC0, 0x64, Local0, Local1)
Multiply(Local1, 0x0A, Local1)
Store(Local1, Index(PBIF, 5))
Divide(BFC0, 0x64, Local0, Local1)
Multiply(Local1, 0x03, Local1)
Store (Local1, Index (PBIF, 6))
Store (ToString(BATD), Index (PBIF, 9)) // model
Store (ToHexString(BSN0), Index (PBIF, 10)) // serial
Store (ToString(BMFN), Index (PBIF, 12)) // venor
Store(BDN0, BTNM) // Save the battery number
Return (PBIF)
}
Method (_BST, 0, Serialized)
{
//
// 0: BATTERY STATE
//
// bit 0 = discharging
// bit 1 = charging
// bit 2 = critical level
//
// Get battery state from EC and save it for the charging workaround
Store (BST0, Local0)
Store (Local0, Index (PBST, 0))
//
// 1: BATTERY PRESENT RATE/CURRENT
//
Store (BAC0, Local1)
Subtract(0xFFFF, Local1, Local1)
Store (Local1, Index (PBST, 1))
//
// 2: BATTERY REMAINING CAPACITY
//
Multiply(BFC0, GAU0, Local1)
Divide(Local1, 0x64, Local2, Local1)
If (LAnd (BFWK, LAnd (ADPT, LNot (Local0)))) {
// On AC power and battery is neither charging
// nor discharging. Linux expects a full battery
// to report same capacity as last full charge.
// https://bugzilla.kernel.org/show_bug.cgi?id=12632
Store (GAU0, Local2)
// See if within ~3% of full
ShiftRight (Local2, 5, Local3)
If (LAnd (LGreater (Local1, Subtract (Local2, Local3)),
LLess (Local1, Add (Local2, Local3))))
{
Store (Local2, Local1)
}
}
Store (Local1, Index (PBST, 2))
//
// 3: BATTERY PRESENT VOLTAGE
//
Store (BPV0, Index (PBST, 3))
// Check the Battery Number
If(LNotEqual(BDN0, BTNM)) {
Notify(BATX, 0x81)
}
Return (PBST)
}
}
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